Reel-brake for web-printing machines.



T. R. G. PARKER, W. E. BENNISON & W. LEE.

REEL BRAKE FOR WEB PRINTING MACHINES.

APPLICATION FILED MN- 25. I915.

Patented Oct. 2. 1917.

TED STATES PATENT OFFICE.

THOMAS ROBERT GILLETT PARKER, WILLIAM EDWARD BENNISON, AND WALTER LEE, OF BROADI-IEATH, ENGLAND, ASSIGNORS TO LINOTYPE AND MACHINERY LIMITED,

OF LONDON, ENGLAND.

REEL-BRAKE FOR WEB-PRINTING MACHINES.

Application filed January 25, 1915.

To all whom it may concern:

Be it known that we, THOMAS Ronna'r G-ILLE'rT PARKER, l/VILLIAM EDWARD Bnn visoN, and lVAL'rnn LEE, subjects of the King of the United Kingdom of Great Britain and Ireland, residing at Linotype and Machinery WVorks, Broadheath, in the county of Chester, England, have invented new and useful Improvements in Reel-Brakes for Web-Printing Machines, of which the following is a specification.

This invention relates to reel brakes for web printing machines and it has for its object to provide brakes of such construction as to enable the empty reel spindles to be removed from the machines and new reels to be placed in the machines more expeditiously than has hitherto been possible with existing devices.

In machines printing upon a web, it is necessary to keep the web taut and consequently brake devices are employed for preventing thereel from turning too quickly, these devices bearing frictionally upon either the reel itself or upon the reel spindle.

When the brake is one which involves the application of friction to the reel spindle, it has heretofore generally been in the form of a brake band attached to the machine frame, encircling a brake drum fast on the said spindle, the pressure of the band on the drum being regulated by means of a screw. Brakes of this construction involve the loss of considerable time during the operation of removing an empty reel spindle from, and inserting a new reel in, the machine, owing to the fact that for each such operation it is necessary first to uncouple and afterward to couple the brake.

By means of the present invention the necessity for the just mentioned uncoupling and coupling is entirely avoided and consequently the time necessary for inserting a new reel into the machine is greatly reduced.

In the accompanying drawings, Figure 1 is a plan and Fig. 2 an elevation of the new reel brake mechanism, certain parts in the latter view being, for convenience, conventionally represented in positions other than those in which they are shown in Fig. 1.

Referring to these drawings, 1 is a grooved brake drum fast on the reel spindle 2, which is gripped, with an adjustable pres- Specification of Letters Patent.

Patented Oct. 2', 191 "1.

Serial No. 4,128.

sure, between the two wooden or equivalent blocks or brake-shoes 3, 4.

These brake-shoes are carried respectively by the arms 5, 6, of two brake jaws (which numerals are hereinafter employed to iden tify the I'OSPOCtlVC brake jaws when these are referred to as complete entities), the other arms 7, S, of which are pivoted on a horizontal shaft 9, which turns, but is fixed against axial movement in bearings 10, 11, (Fig. 1) and has fast on it a hand wheel 12 by which it can be rotated. The said shaft is parallel with the reel spindle and is screwthrcaded to engage with the correspondingly screw threaded bosses of the arms 7, 8, so that when it is rotated the brake jaws 5, 6, are moved in the direction of its axis, which movement, being transmitted through the brake drum 1, effects axial adjustment of the reel spindle 2 and the reel thereon to obtain correct register ofthe web.

The two brake jaws 5, 6, are operatively connected, by devices hereinafter described with the pressure adjusting mechanism which comprises a vertical rod or shaft 13, having left and right-handed screwed portions respectively engaging correspondingly threaded nuts 14, 15. The shaft 13 can be rotated by a hand wheel 16 fast thereon, or through gearing or like mechanism, such as 17, connecting it with a hand wheel or equivalent situated at the folder end or other remote part of the machine. The nuts 14, 15, are held against rotation on the shaft 13 by the devices connecting them with the brake jaws 5, (i, so that rotation of the said shaft will cause them to move in relatively opposite directions, thereby increasing the pressure of the brake-shoes 3, 1, on the brake drum 1, according to the direction of such rotation.

The connection between the lower brake jaw 5 and the nut 14. is made through a bipartite arm, 18, 19, the part 18 of which is pivoted to the said jaw by a vertical stud 20 and axially swiveled at 21 to the part 19 (hereinafter referred to as a fork,) which latter is forked both vertically and horizontally so as to embrace two sides of the nut 14 and studs 22, 23, projecting therefrom, thereby establishing an efiectivc connection between the said fork 19 and nut 14 and yet allowing the former to freely turn and slide relatively to the latter.

reel.

The connection between the upper brake jaw 6 and nut 15 is effected by means of a tri partite arm 24, 25,26, the last-mentioned part (26hereinafter referred to as a fork) being a replicaof the fork 19 just described, connected to the nut 15 inthe same manner as the said fork 19 is connectedtoits nut 14, and axially swivelled at 27 to the part 25. The part2'4 is pivoted to the brake jaw 6 by a vertical stud 28, and it ,is also pivoted, horizontally at 29, to the part 25. A fur- .ther connection between the two parts 24 It will be seen that the brake jaw 5 with .its arm 7, and the parts 18, 19, constitute what is virtually a lower brake lever capable of rocking about theaxis ofthe shaft 9 and that the brake jaw 6 with its arm 8,'and the parts 24, 25 and 26, similarly constitute an upper brake lever capable of rocking about the same axis; as a matter of convenience the term brake lever, as hereinafter employed, is intended to refer to a combination of parts which, as a whole, 'is capable of rocking about the axis of the shaft 9.

In an apparatus provided with the foregoing devices, a change of reel .is effected as follows. The pressure of the brake-shoes 3, 4, on the brake drum 1 is first released by rotating the shaft 13 in the direction necessary to cause a movement of the nuts 14, 15, toward each other, this movement effecting a rocking of the upper and lower brake levers on their pivot 9, thus bringing. the shoes 3, 4, out of frictional contact with the brake drum 1. The plunger 30 is then manually withdrawn from the hole 32, thus disestablishing the rigid connectionbetween the parts 25 and 24, and enabling the upper brake jaw 6 and the part 24 to be swung freely, as a single entity, on the pivot 9, the forked end of the-part 26 meanwhile pivoting and sliding upon the studs fast to the respective nut 15, until the arms6 and 8 and parts 24, 25 and-.26assume'the positions in which they are respectively shown in dot and-dash lines in Fig.2, at which juncture the plunger 30, under the action of the spring3l, automatically engages the'hole 33 then presented to it, thereby'ftemporarily looking all the parts in the last-mentioned position. The reel spindle 2 may then be lifted andmoved-awayrto make room forthe insertion of a new reel. qAfter-a new reel has been inserted, the series of operations just described is carried out in the reverse order.

Having described our invention, we declare that what we claim and desire to secure by Letters Patent is 1. In a reel brake, the combination with a brake drum and a shaft whose axis 1s parallel with that of the brake drum, of a'brake :lever comprising a first part mounted upon,

and adapted to rock about the axis of, the said shaft, a second part, and a stud directly pivoting the second part to the first part and having its axisperpendicular tothat of the said shaft.

2. In a reel brake, the combination with a brake drum and a shaft :whose axis is parallel with that of thebrake drum, of a brake lever comprising a firstipartmounted upon,

and adapted to rock about'the-axis of, the

said shaft, a second-part pivoted to the first part and adapted to turn about "an axis perpendicular to-that of the said shaft, and

a third part swiveledtdthesecondzp'art and adapted to turnabout an axis perpendicular to and intersecting the axis of the pivot which connects together thefirst and second gether the first and second parts, a fourth part swiveled to the third part and adapted to'turn about an axis perpendicular to and intersecting the axis ofthe pivot connecting i together the second and third parts, and means for locking together the said second and third parts indifferent positions'rela tively to each other. i

4. In a reel brake,'the cornbinationwith a brake drum and a shaft-whose axis is parallelwith'that of the brake drum, of-a brake lever comprising a first part mounted upon, and adaptedto rockabo'ut the axisvof, the said shaft, 1 a second part pivoted to the first part-and adaptedto turn about an axis perpendicular to that of the said shaft, a third partpivoted to the second part and adapted "to turn relatively thereto about an axis lying in a plane-perpendicular to'that containing the. axis of the pivot connecting together the first and second parts, a fourth part swiveledto thethird part and adapted torturn about anaxis perpendicular to and intersecting the axis of the pivot connecting together the second and third parts.

and an adjustable spring plunger adapted to lock together the said second and third parts in relatively different position.

5. In a reel brake, the combination with a brake drum and a shaft whose axis is parallel with that of the brake drum, of a lower brake lever and an upper brake lever each comprising a first part mounted upon, and adapted to rock about the axis of, the said shaft, a second part pivoted to the first part and adapted to turn about an axis perpendicular to that of the said shaft, and a third part swiveled to the second part and adapted to turn about an axis perpendicular to and intersecting the axis of the pivot which connects together the first and second parts, the first part of one of the said levers being adapted to be rocked into different positions about the axis of the said shaft independently of the other lever, means adapted to lock the said first part when so rocked, and means adapted to simultaneously rock both levers about the axis of the said shaft in relatively opposite directions.

(5. In a reel brake, the combination with a brake drum and a shaft whose axis is parallel with that of the brake drum, of a lower brake lever comprising a first part mounted upon, and adapted to rock about the axis of, the said shaft, a second part pivoted to the first part and adapted to turn about an axis perpendicular to that of the said shaft, and a third part swiveled to the second part and adapted to turn about an axis perpendicular to and intersecting the axis of the pivot which connects togetherthe first and second parts, an upper brake lever comprising a first part mounted upon, and adapted to rock about the axis of, the said shaft, a second part pivoted to the first part and adapted to turn about an axis perpendicular to that of the said shaft, a third part pivoted to the second part and adapted to turn relatively thereto about an axis lying in a plane perpendicular to that containing the axis of the pivot connecting together the first and second parts, a fourth part swiveled to the third part and adapted to turn about an axis perpendicular to and intersecting the axis of the pivot connecting together the second and third parts, and means for looking together the said second and third parts in different positions relatively to each other, and means adapted to simultaneously rock both the levers in relatively opposite directions about the axis of the said shaft.

7. In a reel brake, the combination with a brake drum and a shaft whose axis is parallel with that of the brake drum, of a lower brake lever comprising a first part mounted upon, and adapted to rock about the axis of, the said shaft, a second part pivoted to the first part and adapted to turn about an axis perpendicular to that of the said shaft, and a third part swiveled to the second part and adapted to turn about an axis perpendicular to and intersecting the axis of the pivot which connects together the first and second parts, an upper brake lever comprising a first part mounted upon, and adapted to rock about, the axis of, the said shaft, a second part pivoted to the first part and adapted to turn about an axis perpendicular to that of the said shaft, a third part pivoted to the second part and adapted to turn relatively thereto about an axis lying in a plane perpendicular to that containing the axis of the pivot connecting together the first and second parts, a fourth part swiveled to the third part and adapted to turn about an axis perpendicular to and intersecting the axis of the pivot connecting together the second and third parts, and an adjustable spring plunger adapted to lock together the said second and third parts in relatively different positions, and means adapted to simultaneously rock both the levers in relatively opposite directions about the axis of the said shaft.

8. In a reel brake, the combination with a brake drum and a shaft whose axis is parallel with that of the brake drum, of a lower brake lever and an upper brake lever each comprising a first part mounted upon, and adapted to rock about the axis of, the said shaft, a second part pivoted to the first part and adapted to turn about an axis perpendicular to that of the said shaft, and a third part swiveled to the second part and adapted to turn about an axis perpendicular to and intersecting the axis of the pivot which connects together the first and second parts, and means adapted to simultaneously rock both the levers in relatively opposite directions about the axis of the said shaft.

9. In a reel brake, the combination with a brake drum and a shaft whose axis is parallel with that of the brake drum, of a lower brake lever comprising a first part mounted upon, and adapted to rock about the axis of, the said shaft, a second part pivoted to the first part and adapted to turn about an axis perpendicular to that of the said shaft, and a third part swiveled to the second part and adapted to turn about an axis perpendicular to and intersecting the axis of the pivot which connects together the first and second parts, an upper brake lever comprising a first part mounted upon, and adapted to rock about the axis of, the said shaft, a second part pivoted to the first part and adapted to turn about an axis perpendicular to that of the said shaft, a third part pivoted to the second part and adapted to turn relatively thereto about an axis lying in a plane perpendicular to that containing the axis of the pivot connecting together the first and second parts, a fourth part swiveled to the third part and adapted to turn about an axis perpendicular to and intersecting the axis of the pivot connecting together the second and third parts, and means for locking together the said second and third parts in different positions relatively to each other, a rotatable shaft, two respectively righthand and left-hand screw-threaded portions on the saidrotatable shaft, correspondingly screw-threaded nutsin engagement withthe said portions, and connections between the said nuts and the respective brake levers adapted to hold the nuts against rotation and transmit to the levers the motion imparted to the nuts *by the rotation of the shaft. I

10. In a reel brake, the combination with a brake drum, of a rotatable, screw-threaded shaftwhose axis is parallel with-that ofthe brake drum,'and two brake levers each comprising a first part having a boss-in screwthreaded engagement with and turnable on the said shaft, 'a second part pivoted-to the first part and adapted toturn about anaxis perpendicular to and intersecting that of the said shaft When such shaft is'turned, anda third part swiveled-to the second part and adapted to'turn about an axis perpendicular to and intersecting the axis of the pivot which connects together thefirst-and second parts.

11. In a reel brake, the combination with abrake drum, of a rotatable, screw-threaded shaft whose axis is parallel with that of the brake drum two brake levers each comprising -a first 'part having a boss in screwthreadedengagement with and turnable on the said shaft, a-second part-pivoted'to the first part and adapted toturn'about an axis perpendicular to and intersecting that of'the said shaft when such shaft-is turned, anda third part swiveledto the second part and adapted to turn about an axis perpendicular to and intersecting the axis of the pivot which connects together the first andsecond parts,-the first part of one'of the said levers being adapted to be'rocked intodifierent positions about the axis of the said'shaft independently of the other lever, means adapted to lock thesaid first part when so rocked, andmeans adapted to simultaneously rock both levers about the axis of the said shaft in relatively oppositedirections.

12. In a reel brake, the combination with a brake drum, of arotatable,screw-threaded shaft -WhOS8 axis is parallel withthat ofthe brake drum, a lower brake lever comprising a first part "having a boss in screwthreaded engagement with and turnable on the said shaft, a secondpart pivoted=to the first part and-adaptedto turn about an axis perpendicular to and intersecting that of the saidshaft when'such shaft is turned, and a third part swiveled to the second part and adapted to turn about-anaxis'perpendicular to and intersecting the axis of the pivot to the third partand adapted to turn about an axis perpendicular-to and intersecting the axis of=the pivot connecting together the second and third parts, and an adjustable spring plunger adapted-to lock together the said second and third parts in relatively different positions, and means adapted to simultaneously rock both the levers in relatively opposite directions about'the axis of the said'shaft.

In witness whereof we have hereunto set our hands in the presence oftwo witnesses.

lHOMAS'ROBERT GILLET'I PARKER. WILLIAM EDWARD BEN N I-SON WALTER J1EE. Witnesses:

ERNALD SIMPSON MosELEY,

MALCOLM SMETHURST.

Copies of thispatent may be obtainedror fivecents each, by addressing the Commissioner ofllatents, 7 "Washington,:]): 0. 

